AutomaticTimeSpanScaleOptions.AggregateFunction Property

Gets or sets the function that is used to aggregate time-span axis data when one of the AxisX2D.TimeSpanScaleOptions, AxisX3D.TimeSpanScaleOptions or RadarAxisX2D.TimeSpanScaleOptions properties is set to AutomaticTimeSpanScaleOptions.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v23.2.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public AggregateFunction AggregateFunction { get; set; }

VB.NET

Public Property AggregateFunction As AggregateFunction

Property Value

Type	Description
AggregateFunction	An aggregate function that applies to series points.

Available values:

Name	Description
None	The aggregate function is not applied.
Average	Aggregates data by calculating the average value for a selected numeric or date-time interval.
Minimum	Aggregates data by calculating the minimum value for a selected numeric or date-time interval.
Maximum	Aggregates data by calculating the maximum value for a selected numeric or date-time interval.
Sum	Aggregates data by calculating the summary for a selected numeric or date-time interval.
Count	Aggregates data by calculating the number of non-null values for a selected numeric or date-time interval.
Histogram	Aggregates data by calculating the number of all points for a selected numeric or date-time interval.
Financial	Aggregates financial data for a selected interval into a single high-low-open-close data point, so that the high value equals the highest value of all data points in this interval; the low value equals the lowest value of all data points; the open value equals the value of the first data point and the close value equals the value of the last data point.
Custom	Aggregates data using the custom CustomAggregateFunction calculator.

Remarks

When the AggregateFunction property is not specified, the Chart uses the Average function:

When the AggregateFunction is set to None, series points are grouped by their arguments and an arithmetic operation is not applied to data:

Example

This code snippet shows how to access the automatic date time scale options for the x-axis scale and specify the aggregate function.

XAML

<dxc:ChartControl>
    <dxc:XYDiagram2D>
        <!--. . .-->
        <dxc:XYDiagram2D.AxisX>
            <dxc:AxisX2D>
                <dxc:AxisX2D.TimeSpanScaleOptions>
                    <dxc:AutomaticTimeSpanScaleOptions AggregateFunction="Sum"/>
                </dxc:AxisX2D.TimeSpanScaleOptions>
            </dxc:AxisX2D>
        </dxc:XYDiagram2D.AxisX>
    </dxc:XYDiagram2D>
</dxc:ChartControl>